7 papers
Semi-Blind Channel Estimation for Dynamic NTN Systems via Spiked Random Matrix Theory
Xue Zhang, Abla Kammoun, Mohamed-Slim Alouini
Semi-blind channel estimation offers an attractive tradeoff between pilot overhead and estimation accuracy in large-scale wireless systems. However, reliable channel acquisition be…
Joint Beamforming, Energy Management, and Trajectory Optimization for Figure-Eight Loitering in Solar-Powered HAPS-Enabled ISAC Systems
Xue Zhang, Bang Huang, Mohamed-Slim Alouini
Solar-powered high-altitude platform stations (HAPSs) provide a promising platform for integrated sensing and communication (ISAC) owing to their wide-area coverage and long-endura…
Toward Environment-Aware LAE: SAR as a Shared Sensing Infrastructure
Xue Zhang, Bang Huang, Mohamed-Slim Alouini
The rapid growth of the low-altitude economy (LAE) is making aerial systems an important part of future digital infrastructure. Although major advances have been achieved in unmann…
CRB-Based Resource Allocation in Multi-User Uplink Transmissions
Xue Zhang, Abla Kammoun, Mohamed-Slim Alouini
In this work, we study the design of receivers for uplink multi-user systems, aiming to estimate both the channel and the transmitted symbols. We consider two estimation strategies…
Fundamental limits via CRB of semi-blind channel estimation in Massive MIMO systems
Xue Zhang, Abla Kammoun, Mohamed-Slim Alouini
This paper investigates the asymptotic behavior of the deterministic and stochastic Cramér-Rao Bounds (CRB) for semi-blind channel estimation in massive multiple-input multiple-out…
Design of 3D Beamforming and Deployment Strategies for ISAC-based HAPS Systems
Xue Zhang, Bang Huang, Mohamed-Slim Alouini
This paper explores high-altitude platform station (HAPS) systems enabled by integrated sensing and communication (ISAC), in which a HAPS simultaneously transmits communication sig…
Network-Level Analysis of Integrated Sensing and Communication Using Stochastic Geometry
Ruibo Wang, Baha Eddine Youcef Belmekki, Xue Zhang +1
To meet the demands of densely deploying communication and sensing devices in the next generation of wireless networks, integrated sensing and communication (ISAC) technology is em…